Pesticide Air Monitoring Results Database

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The Department of Pesticide Regulation maintains a Pesticide Air Monitoring Results Database containing both preliminary and published data from pesticide air monitoring studies conducted throughout California. DPR's Pesticide Air Monitoring Results Database was developed in 2018 to provide access to collected pesticide ambient air monitoring results in an easier to use format.

What's Included?

The database contains both preliminary and published results from seasonal and long-term ambient air monitoring studies conducted by DPR and the California Air Resources Board.

Intensive seasonal ambient monitoring studies are normally conducted in multiple high-use communities during the high-use season for individual pesticides and last anywhere from 4-16 weeks depending on the study. Long-term ambient air monitoring studies are conducted in a single or multiple communities on a year-round basis for one or more years.

Both seasonal and long-term ambient air monitoring studies produce data that is used to estimate concentrations associated with subchronic, annual, and lifetime exposures. Additionally, data collected from these monitoring studies assists DPR in assessing potential health risks, developing measures to mitigate risks, and measuring the effectiveness of regulatory requirements.

DPR's Pesticide Air Monitoring Results Database currently contains air monitoring results from the following studies:

  • Long-Term Ambient Air Monitoring:
    • Air Monitoring Network (2011 – present)
    • Toxic Air Contaminant Program Monitoring (2010 – 2017)
    • 1,3-Dichloropropene Ambient Air Monitoring Study (2016 - present)
  • Intensive Seasonal Ambient Air Monitoring:
    • MITC Monitoring in Fresno County (March – July 2017)
    • MITC Monitoring in Kern County (June – August 2017)
    • Methyl Bromide and Chloropicrin Monitoring in Siskiyou County (July – September 2017)
    • Chloropicrin Monitoring in the Santa Maria Region (August – October 2017)
    • Organophosphate Monitoring in Imperial County (January – March 2018)
    • Organophosphate Monitoring in Kern County (March – May 2018)
    • Organophosphate Monitoring in Fresno and Tulare Counties (June – August 2018)

The database is composed of two types of data: Published and Preliminary. 'Published' refers to results that have been thoroughly reviewed and verified and have been included in a publication. 'Preliminary' refers to newer results that have gone through a preliminary review and verification process, but may be subject to change after further verification, and have yet to be included in a publication.

What's New?

The database contains a total of 107,052 ambient air sample records and was last updated on May 7, 2024.

This update contains results for the 1,3-D study and the Air Monitoring Network through December 31, 2023.

For database definitions please see the attached ReadMe, DOC file.

Active Monitoring Locations

Weekly sampling is conducted at Oxnard, Santa Maria, Shafter, and Watsonville locations. Ambient air in these locations is monitored for 35 pesticides and 5 breakdown products. In addition to the AMN sites, weekly sampling is ongoing at Delhi and Parlier as part of the targeted 1,3-D study.

Weekly Sampling Sites
Study Site CD Site Name Status Currently Monitoring
257 257-BA Shafter Active 35 pesticides + 5 breakdown products
257 257-E Watsonville Active 35 pesticides + 5 breakdown products
257 257-DA Santa Maria Active 35 pesticides + 5 breakdown products
257 257-G Oxnard Active 35 pesticides + 5 breakdown products
309 309-A Delhi Active 1,3-D
309 309-B Parlier Active 1,3-D

Results from the Pesticide Air Monitoring Results Database are available for download as a .CSV file.

Access the Data via FTP(revision05072024)

Download the .CSV file (revision06142024)

For content questions, contact: